Exerciser



FIG. 1 is a front, right and top perspective view of an exerciser showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side elevational view thereof, the left side being a mirrored image;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for an exerciser, as shown and described. 